EP2631148B1 - DIspositif et procédé de mesure de la vitesse d'un câble de traction d'un télépérique, notamment un télésiège ou télécabine - Google Patents

DIspositif et procédé de mesure de la vitesse d'un câble de traction d'un télépérique, notamment un télésiège ou télécabine Download PDF

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Publication number
EP2631148B1
EP2631148B1 EP13354006.2A EP13354006A EP2631148B1 EP 2631148 B1 EP2631148 B1 EP 2631148B1 EP 13354006 A EP13354006 A EP 13354006A EP 2631148 B1 EP2631148 B1 EP 2631148B1
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EP
European Patent Office
Prior art keywords
cable
sensors
speed
marks
distance
Prior art date
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Application number
EP13354006.2A
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German (de)
English (en)
French (fr)
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EP2631148A1 (fr
Inventor
Olivier Bertolami
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Poma SA
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Poma SA
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/80—Devices characterised by the determination of the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/02—Devices characterised by the use of mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/66—Devices characterised by the determination of the time taken to traverse a fixed distance using electric or magnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks

Definitions

  • the invention relates to measurements of the speed of a cable of traction of a cable car, in particular a chairlift or gondola.
  • aerial cables of cable cars are driven by a driving pulley set in motion by a drive motor.
  • the speed of rotation of the driving pulley, or of a roller for guiding the cable is measured using a rotational speed sensor, of the encoder or tachometer type.
  • a rotational speed sensor of the encoder or tachometer type.
  • Imprecision on the speed of the cable can lead to differences in cable speed, the timing of towed vehicles and stops.
  • EP 0 355 994 discloses a device for measuring the speed of movement of a cable with induced electrostatic charges on the surface of the cable.
  • the apparatus includes first and second electrostatic charge sensors adapted to each generate an electrical signal whose magnitude is the amount of electrostatic charge on the surface. But it is not suitable for measuring the speed of a cable coated with a non-metallic coating.
  • the object of the invention consists in overcoming these drawbacks, and more particularly in providing a device for measuring the speed of a cable of traction of a cable car which is sufficiently precise and easy to use, in particular to offer security and improved reliability of people transportation.
  • a cable car including a chairlift or gondola, comprising a device for measuring the speed of a tow rope of the cable car, the cable comprising markers, and the device comprising first and second sensors configured to respectively transmit first and second marker presence information signals, the second sensor being located at a reference distance from the first sensor, a first determining means configured to determine a phase difference between the first and second signals of the first sensor; information and a second determining means for determining a cable speed information from the determined phase shift and the reference distance, characterized in that the first and second sensors are capacitive distance sensors configured to transmit, each, a information signal of the distance between the cue marks ble and said sensor.
  • the speed is measured as close as possible to the cable for better accuracy.
  • Such a measuring device is easy to use and requires few adjustments and a reduced number of calibration steps.
  • Capacitive sensors have the advantage of being able to detect the presence of all types of objects because they are sensitive to metals and non-metals. Such sensors are particularly suitable for metal cables having a non-metallic coating.
  • the reference distance may be strictly less than the smallest distance separating two pins of the cable.
  • the cable comprises several strands assembled to form several strands, the strands being helically wound to form grooves corresponding to the cable markings and arranged between two successive strands of the cable.
  • the helical structure of the cable naturally forms marks (furrows) on the cable and makes it possible to dispense with affixing additional markings on the cable.
  • a method for measuring the speed of a tow rope of a cable car, in particular a chairlift or gondola, the cable comprising landmarks comprising first and second indication of presence of the marks, the second signaling being carried out at a reference distance of the first signaling, a determination of a phase difference between the first and second signals and a determination of a cable speed information from the determined phase shift and the reference distance, characterized in that the first and second signals respectively comprise first and second capacitive distance sensors configured to transmit, each , an information signal of the distance between the pins of the cable and said sensor.
  • FIG. 1 there is shown a device 1 for measuring a speed information V of a traction cable 2 of a cable car.
  • the cable 2 to which the vehicles (cabs, seats, funicular) carrying the passengers are attached is driven by a driving pulley housed in a station and set in motion by a drive motor.
  • electric type not shown here for simplification purposes.
  • the cable 2 is metallic and highly resistant to traction. Cable 2 can possibly be covered, partially or completely, by a protective coating of non-metallic material, for example plastic.
  • the cable 2 comprises, generally, several strands wound helically.
  • a set of helically wound strands form a strand 3, and the cable 2 may further comprise several strands 3 which are also helically wound for better tensile strength.
  • a cable 2 comprising, for example, six strands 3 wound helically.
  • the helically wound strands 3 form grooves 4, so that each groove 4 is located between two successive strands 3 of the cable 2. It may be noted that in a helical configuration, the strands 3 and the grooves 4 are located alternately along of the cable 2 and form pins 5 on the surface of the cable 2.
  • the cable 2 comprises a pitch P corresponding to the distance between two successive pins 5 of the cable, for example the distance between two successive grooves 4 or between two 3 successive strands.
  • the measuring device 1 comprises first and second sensors 7, 8, and a measurement block 9.
  • the measurement block 9 comprises a first determination means 10 for determining a phase shift dt between two signals and a second means of determination 11 to determine the speed information V of the cable 2.
  • the measurement block 9 may be, for example, a microprocessor integrated in a computer or a programmable controller.
  • the sensors 7, 8 are presence sensors of the markings 5 of the cable 2.
  • the first sensor 7 transmits a first signal S1 of presence information of a mark 5 of the cable 2 towards the first determination means 10, via a connection 12.
  • the second sensor 8 transmits a second information signal S2 of presence of a mark 5 of the cable 2 in the direction of the first determining means 10, via a connection 13.
  • each signal S1, S2 emitted by a sensor 7, 8 has an amplitude that varies according to whether the marker is detected by the sensor or not. For example, the amplitude of the signal is maximum when the marker is detected, and minimum otherwise.
  • the second sensor 8 is located at a reference distance dx of the first sensor 7.
  • the first determination means 10 receives the two signals S1 and S2 and calculates their phase shift dt, which it transmits to the second determination means 11 by A connection 14.
  • the second determining means 11 determines a speed V of the cable 2, preferably a speed V of a longitudinal displacement of the cable 2, from the phase shift dt and the reference distance dx.
  • the reference distance dx is strictly less than the smallest distance between two pins 5 of the cable 2.
  • the pins of the cable is equal to the pitch P of the cable 2.
  • the reference distance dx remains lower than the pitch P, even in the case of elongation of the cable 2.
  • the second processing means 11 is further configured to determine the direction of movement of the cable, in forward or reverse, depending on the sign of the phase shift dt.
  • the sensors can be digital or analog.
  • the digital sensors transmit digital signals S1, S2 to the first determination means 10.
  • the first determination means comprises synchronization means for synchronizing the signals S1, S2 so that they have the same frequency before calculate their phase shift dt.
  • the accuracy of the calculation of the phase shift of the signals S1, S2 is improved.
  • the sensors 7, 8 may also be analog sensors which transmit analog signals S1, S2 to the first determining means 10.
  • the first determining means 10 comprises analog / digital converters for converting the first and second signals. analog to two digital signals, respectively referenced SN1 and SN2, and calculates the phase shift dt between the two digital signals SN1, SN2.
  • the analog / digital converters are preferably coupled to a generator of a clock signal so as to synchronize the digital signals SN1, SN2.
  • the synchronization of the digital signals SN1, SN2 makes it possible to generate two signals SN1, SN2 which have the same frequency.
  • the amplitudes A have their digital signals SN1, SN2 as a function of time t. It can be noted that each digital signal SN1, SN2 has a high level when a marker is present next to the associated sensor, and a low level otherwise.
  • the sensors 7, 8 are inductive analog distance sensors.
  • cable 2 is of a metallic nature and the sensors 7, 8 are eddy current inductive analog distance sensors.
  • the sensors 7, 8 produce an oscillating electromagnetic field, and when the metal surface of the cable 2 penetrates this field, the latter is attenuated.
  • the presence information signal delivered by the sensors 7, 8 may be an electrical voltage whose value varies as a function of the relative position of the mark 5 vis-à-vis the sensor, that is to say as a function of the distance from the surface of the mark 5 with respect to the sensor 7, 8.
  • sensors 7, 8 are non-contact because the interaction between the cable and the sensor is performed via the oscillating electromagnetic field.
  • the analog sensor delivers a signal that has a high level when the cable is near the sensor, and a low level otherwise.
  • the advantage of such sensors 7, 8 is to be able to detect the presence of any metal object and are particularly suitable for towing cables 2 of a cable car which comprise strands 3 wound helically. Alternatively, there may be additional metal markers on the surface of the cable 2 which are different from the grooves 4 or strands 3.
  • the cable 2 is ferromagnetic in nature and the sensors 7, 8 are variable inductance inductive distance sensors with variable reluctance.
  • the sensor assembly 7, 8 cable 2 forms a magnetic circuit, and the distance between the surface of the cable 2 and the sensor 7, 8 determines the reluctance of the magnetic circuit.
  • the delivered signals also have levels which vary according to the distance between the surface of the ferromagnetic pins of the cable 2 and the sensor 7, 8.
  • the sensors 7, 8 are capacitive analog distance sensors.
  • the measuring head of such sensors is formed of a cylindrical conductor and a metal casing providing a capacitor having a reference capacitance.
  • the reference capacity varies and the signal delivered by the sensor decreases.
  • Such sensors are particularly suitable for measuring the speed of a cable coated with a non-metallic coating, for example a plastic coating.
  • the marks may be lugs located on the surface of the coating. It is also not necessary that the marks are evenly spaced on the surface of the cable 2.
  • the sensors 7, 8 may be image acquisition systems, for example miniaturized digital cameras, configured to capture images of the surface of the cable 2.
  • the measuring device 1 comprises at least one lighting system 15, 16 associated with the two sensors 7, 8, or a sensor lighting system.
  • the lighting systems 15, 16 are controlled by control means 17, preferably included in the measurement block 9.
  • Each lighting system 15, 16 may comprise one or more light-emitting diodes for illuminating a surface of the cable 2 so allowing the sensors 7, 8 to acquire images of the surface and transmit them, via the first and second digital or analog signals S1, S2, to the first determination means 10.
  • the first determination means 10 further comprises means for processing digital images, for example a digital signal processor provided with software tools for the recognition of objects within an image.
  • the image processing means recognize the presence or absence of pins 5 in the image and respectively generate two digital signals SN1, SN2 having a high level, when the marker is recognized in the image, and a low level otherwise.
  • the marks may be a mark affixed to the surface of the cable 2, for example a mark made using a reflective paint.
  • the cable comprises markings, for example grooves separating two successive strands of the cable, or others.
  • the method comprises a first step E1 in which a first signaling is carried out to signal the presence of the cable markers at a first point of passage of the cable, then a second step E2 in which a second signaling is carried out to signal the presence of the markers of the cable. cable to a second passage point of the remote cable with a reference distance dx of the first waypoint. Then a third phase is determined at a third step E3 between the two previous signalings, and a fourth step E4 determines the speed V of the cable from the determined phase shift and the reference distance.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Bridges Or Land Bridges (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP13354006.2A 2012-02-22 2013-02-08 DIspositif et procédé de mesure de la vitesse d'un câble de traction d'un télépérique, notamment un télésiège ou télécabine Active EP2631148B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1200517A FR2987130B1 (fr) 2012-02-22 2012-02-22 Dispositif et procede de mesure de la vitesse d'un cable de traction d'un telepherique, notamment un telesiege ou telecabine

Publications (2)

Publication Number Publication Date
EP2631148A1 EP2631148A1 (fr) 2013-08-28
EP2631148B1 true EP2631148B1 (fr) 2017-06-28

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Application Number Title Priority Date Filing Date
EP13354006.2A Active EP2631148B1 (fr) 2012-02-22 2013-02-08 DIspositif et procédé de mesure de la vitesse d'un câble de traction d'un télépérique, notamment un télésiège ou télécabine

Country Status (6)

Country Link
US (1) US9128110B2 (ko)
EP (1) EP2631148B1 (ko)
JP (1) JP6067410B2 (ko)
KR (1) KR102035348B1 (ko)
CN (1) CN103293331B (ko)
FR (1) FR2987130B1 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106841656B (zh) * 2016-12-09 2024-02-06 中国恩菲工程技术有限公司 数码测速传动装置、索道控制装置及索道控制方法
CN108100793B (zh) * 2017-12-12 2019-09-03 中国矿业大学 一种绳系提升系统中提升绳索的速度监测方法
FR3093588B1 (fr) * 2019-03-07 2021-02-26 Socomec Sa Dispositif de récupération d’energie sur au moins un conducteur de puissance et procédé de fabrication dudit dispositif de récupération
KR102237268B1 (ko) * 2020-01-16 2021-04-06 김석환 플로우 베리에이션 디텍팅 시스템
CN111650392A (zh) * 2020-07-03 2020-09-11 东北大学 基于线阵相机立体视觉的金属板材运动速度检测方法

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CH588703A5 (en) * 1975-10-30 1977-06-15 Garaventa S Karl Soehne Ag Sensor determining movement of electrically conductive thread - travelling in straight line between magnetic poles and coil for generation of dependent voltage
DE2856032A1 (de) * 1978-01-03 1979-07-12 Coulthard John Vorrichtung und verfahren zum messen der geschwindigkeit einer relativbewegung zwischen einem ersten koerper und einem zweiten koerper bzw. einem stroemungsmittel
FR2424837A1 (fr) * 1978-05-02 1979-11-30 Laurent Roger Dispositif de controle de serrage d'une pince, notamment d'une tele-cabine
GB8817500D0 (en) * 1988-07-22 1988-08-24 B Kent Plc Ab Cross-correlation apparatus & methods
KR950013780B1 (ko) * 1990-05-22 1995-11-16 후루까와 뗀끼 고요교오 가부시끼가이샤 이동하고 있는 길다란 물건의 길이를 측정하는 장치 및 그 방법
US5263309A (en) * 1992-05-11 1993-11-23 Southwire Company Method of and apparatus for balancing the load of a cabling apparatus
CA2169431C (en) * 1995-03-06 2005-07-12 Claudio De Angelis Equipment for recognising when synthetic fibre cables are ripe for being discarded
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EP1549960A1 (en) * 2002-10-11 2005-07-06 The Timken Company Speed sensing method and apparatus
DE102008039025B4 (de) * 2008-08-21 2015-04-02 Sikora Aktiengesellschaft Verfahren zum berührungslosen Messen der Geschwindigkeit und/oder der Länge eines in Längsrichtung bewegten Strangs, insbesondere eines Kabels

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Also Published As

Publication number Publication date
FR2987130A1 (fr) 2013-08-23
KR20130096675A (ko) 2013-08-30
FR2987130B1 (fr) 2015-03-06
JP2013174591A (ja) 2013-09-05
US9128110B2 (en) 2015-09-08
CN103293331B (zh) 2018-02-02
US20130213133A1 (en) 2013-08-22
KR102035348B1 (ko) 2019-10-22
CN103293331A (zh) 2013-09-11
EP2631148A1 (fr) 2013-08-28
JP6067410B2 (ja) 2017-01-25

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